According to the provisions of the securities legal system, regarding the information disclosure in the non-public offering and trading of corporate bonds, the following statement is correct ().

Answer: a, c, d

This topic investigates the non-public offering and information disclosure of corporate bonds. Scheme B: For non-public issuance of corporate bonds, the underwriting institution or the issuer that sells itself according to law shall file with the China Securities Association within 5 working days after each issuance.